CN111734055A - Greening roof structure and construction method thereof - Google Patents
Greening roof structure and construction method thereof Download PDFInfo
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- CN111734055A CN111734055A CN202010505237.0A CN202010505237A CN111734055A CN 111734055 A CN111734055 A CN 111734055A CN 202010505237 A CN202010505237 A CN 202010505237A CN 111734055 A CN111734055 A CN 111734055A
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
- A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
- A01G24/15—Calcined rock, e.g. perlite, vermiculite or clay aggregates
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Soil Sciences (AREA)
- Botany (AREA)
- Cultivation Of Plants (AREA)
Abstract
A greening roof structure comprises a roof structure layer, a waterproof heat-insulating layer, a protective isolation layer, a solid water drainage and storage layer, a soil isolation baffle, a soil culture layer and a plant layer. The plant layer comprises herbaceous plant seeds and Crassulaceae plant seedlings. The invention relates to an energy-saving and environment-friendly system for preventing a room from overheating by utilizing solar energy blocked by plants planted on a roof plate of a greening roof structure. The principle is that a heat-insulating, anti-seepage, environment-friendly and energy-saving integrally-covered roof system is formed by laying and constructing a protective isolation layer, a water-dredging layer, a soil-isolation layer, a culture layer, a plant layer and the like. The invention has the characteristics of high construction speed, low cost, light weight, almost no need of maintenance and low inspection frequency.
Description
Technical Field
The invention relates to the field of roof greening, in particular to a greening roof structure and a construction method thereof.
Background
The greening roof is characterized in that a lawn, a ground cover, small shrubs and climbing plants are utilized to cover and green the roof and the top plate of the underground building according to the characteristic that the building load is small. A small path and a courtyard can be left on the roof for people to walk and stay. The existing greening roof generally adopts lawns, but an irrigation system is required to be arranged independently, so that resources are wasted; meanwhile, the existing greening roof is only a building roof supplemented with planting soil or provided with containers for planting plants, has poor functional associativity with the roof, and cannot form an integral covering roof system with multifunctional heat insulation, permeability resistance, environmental protection and energy conservation; and meanwhile, the cost is high, and the maintenance cost is high.
Disclosure of Invention
The invention aims to provide a greening roof structure and a construction method thereof, and aims to solve the technical problems that an existing greening roof is single in function, an irrigation system needs to be arranged independently, and the application range is low.
In order to achieve the purpose, the invention adopts the following technical scheme:
a greening roof structure comprises a roof structure layer, and further comprises a waterproof heat-insulating layer, a protective isolation layer, a solid water drainage and storage layer, a soil isolation baffle, a soil culture layer and a plant layer which are sequentially compounded on the upper side surface of the roof structure layer from bottom to top in a planting area of the roof structure layer.
The waterproof heat-insulating layer is a root puncture-resistant waterproof heat-insulating layer,
the protective isolation layer is laid on the upper side of the waterproof heat-insulating layer in the same direction as the waterproof heat-insulating layer,
the solid drainage and storage layer is laid on the upper side of the protective isolation layer and comprises a plate body, a water storage tank is uniformly and inwards formed on the upper side of the plate body downwards, the periphery of the water storage tank forms a ledge relative to the water storage tank, drain holes are formed in the ledge, the ledge is positioned at the four corners of the water storage tank and upwards forms bulges, and a drainage tank is formed below the ledge,
the soil isolation layer is a filtering fiber layer, the lower side surface of the filtering fiber layer is fully adhered and bonded with the solid water drainage and storage layer through spraying glue,
the soil separation baffle is vertically arranged and enclosed at the edge of the ridging layer of the planting area, a group of loosening drain holes are arranged on the soil separation baffle,
the ridging layer is sprayed on the upper side of the soil isolation layer and is formed by mixing planting soil, vermiculite, pine needle soil and fertilizer,
the plant layer comprises herbaceous plant seeds and Crassulaceae plant seedlings, and the plant layer is planted in the hilling layer.
The solid water drainage layer is made of polyethylene regenerated material,
the protective isolation layer is an acrylic acid recycling fiber layer, the filtering fiber layer is a polypropylene layer, the surface pore diameter of the polypropylene layer is between 0.06mm and 0.2mm, the puncture resistance bearing capacity is at least 1.2 kN, and the vertical water permeability is at least 130L/sm;
the soil separation baffle is an aluminum plate, the aperture of the loosening drain hole is 5-8 mm, and the aperture distance is not more than 10 mm.
The thickness of the culture soil layer is 80-100 mm, the pH value is 6.0-8.5, and the weight is 1140 kg/m for carrying out double-row high-speed thin film cultivation and carrying out double-row high-speed thin film cultivation.
A greening roof structure, which also comprises an upper side of a roof structure layer and a sidewalk area positioned between soil separating baffles of planting areas at two sides,
the sidewalk area comprises a waterproof heat-insulating layer, a protective isolating layer, a double-layer PE film sliding layer, a drainage plate, a gravel mixture layer and a pavement slab layer which are sequentially compounded on the upper side surface of the roof structure layer from bottom to top,
the double-layer PE film sliding layer is laid on the upper side of the protective isolation layer, two ends of the double-layer PE film sliding layer extend towards the planting area,
the drainage plate is laid on the upper side of the double-layer PE film sliding layer and made of polyethylene regenerated material,
the gravel mixture layer is spread on the upper side of the drainage plate, the thickness of the gravel mixture layer is 30mm-50mm, the gravel mixture comprises gravel with different grain diameters, the grain diameter range of the gravel is 4mm-8mm,
the pavement slab layer is formed by paving unit pavement slabs on the gravel mixture layer, and the gap between every two adjacent unit pavement slabs is not more than 10 mm.
A green roof structure is characterized in that a floor drain area is arranged on a sidewalk area, floor drain spaces which are cut off in a stepped manner from small to large are formed on a roof structure layer of the floor drain area from bottom to top, transition layers which are matched with the shape of the roof structure layer and connected with the roof structure layer are arranged on four sides of each floor drain space, the middle of each floor drain space is communicated up and down,
the upper side surface of the edge part of the transition layer is flush with the upper side surface of the roof structure layer, the upper side surface of the transition layer gradually inclines downwards from the edge part to the center, the upper side surface of the transition layer is connected with a waterproof heat-insulating layer, a protective isolation layer, a double-layer PE film sliding layer and a drainage plate which are sequentially compounded from bottom to top and extend from a sidewalk area to a floor drain area,
the extension end of drain bar weak point is in downside structure, and the drain bar upside of floor drain district both sides has fallen to put and has lapped the base, laps base and drain bar overlap joint all around, and the side facade of lapping the base is equipped with the infiltration space, and the outside cladding in side facade infiltration space has the filter screen, the upside of lapping the base is put flatly and is had steel sheathing, and the four corners of steel sheathing has the nut of height-adjustable and roughness, all around lapping base and steel sheathing unit all with pavement district's rubble mixture layer top tight.
A greening roof structure also comprises a roof convex structure positioned on the upper side of a roof structure layer, a plant root system blocking area is arranged between the planting area and the roof convex structure, a soil separation baffle plate is arranged between the planting area and the plant root system blocking area,
the plant root system stopping area comprises a waterproof heat-insulating layer, a protective isolation layer, a solid water discharging and storing layer and a soil isolation layer which are sequentially compounded from the planting area to the roof projecting structure from bottom to top, and also comprises a gravel belt laid on the upper side of the soil isolation layer,
the waterproof heat-insulating layer is paved from the planting area to the roof convex structure until the waterproof heat-insulating layer is fully paved and covers the top of the roof convex structure,
the protective isolation layer is turned upwards by at least 100mm from the planting area along the roof protruding structure,
the filtering fiber layer is turned upwards by at least 100mm from the planting area along the roof protruding structure,
the width of the gravel belt is 400-600 mm, and the thickness of the gravel belt is 80-100 mm.
A construction method of a greening roof structure comprises the following construction steps:
step one, constructing a roof structure layer;
constructing a waterproof heat-insulating layer;
step three, cleaning and acceptance inspection of the waterproof heat-insulating layer:
a broom is adopted to clean dirt and dust on the waterproof heat-insulating layer, so that drying without sundries is ensured;
checking whether the waterproof heat-insulating layer meets the requirements of a planted roof, whether the lap joint of the waterproof heat-insulating layer is firmly bonded or not, whether the sealing is tight or not, whether the laying direction of the coiled material is correct or not, whether the flashing, the deformation joint and the waterproof structure of the convex structure part of the roof meet the design and specification requirements or not, and finally performing subsequent procedures after the water storage test is qualified;
fourthly, according to the structural contour line and the roof layout drawing, releasing area control points of a planting area, a sidewalk area, a floor drain area and a plant root blocking area on the wall surface of the daughter;
fifthly, constructing and laying protective isolation layers, wherein the laying direction is the same as that of the waterproof heat-insulating layer, the longitudinal and transverse lap joint width between adjacent protective isolation layers is not less than 100mm, and the protective isolation layers are turned over by at least 100mm when encountering a roof protruding structure;
constructing a solid water drainage and storage layer, laying the solid water drainage and storage layer to a sidewalk area, cutting off the solid water drainage and storage layer without turning up the periphery, adopting butt joint in a lap joint mode, cutting and butting when encountering a convex structure of a roof, and avoiding turning up the solid water drainage and storage layer;
constructing a soil isolation layer, namely paving the soil isolation layer from one end of the periphery of the solid water drainage and storage layer, spraying spray glue on the inner lower side surface, and then fully adhering and bonding the spray glue with the solid water drainage and storage layer, wherein the overlapping width of adjacent filter fiber layers is not less than 100mm, and the filter fiber layers are at least turned over by 150mm when encountering a roof protruding structure;
constructing a soil isolation baffle, enclosing the soil isolation baffle around the planting area, wherein the horizontal lap joint width of the soil isolation baffle is not less than 50mm, and the vertical lap joint width is not less than 100mm when meeting yin-yang corners;
step nine, spraying and hilling: after the preparation of the hilling materials by a manufacturer is finished, the hilling materials are put into a storage tank and directly transported to the site, then the hilling materials are directly pumped to a roof greening area by a pump pipe for spraying, a manual control cover plate for preventing hilling from being freely sprayed is arranged at the head of the hilling head, an operator wears a safety tool, the manual control cover plate holds a pipe head with one hand, the pipe head is bent downwards, the hilling materials are sprayed out at an angle of 45 degrees to the horizontal plane, and the spraying radius is controlled within the range of 1.5 m;
the spraying is evenly sprayed from the inside to the outside from the middle to the periphery, the spraying thickness takes the height of the soil separating baffle as a control point and is 3mm-5mm lower than the height of the soil separating baffle, and the positions with uneven spraying thickness are lightly paved and pushed with rake to achieve even thickness;
step ten, planting grass seeds:
herbaceous plant seed: the seed sowing time is 4-6 months, the seed sowing adopts manual sowing, and the sowing density is 1200 grains/square meter;
crassulaceae plant seedling: paying off according to the plant seedling distribution area to determine the position, digging a circular groove with the diameter of 100mm and the depth of 50-70 mm by using a small shovel, planting the culture soil for culturing the plant seedling and the plant seedling together, and compacting peripheral soil in the peripheral gap.
The fifth step is followed by the following steps:
step a, constructing soil isolation baffles on two sides of a pedestrian path area according to a control line, and directly placing the soil isolation baffles on a protective isolation layer;
b, paving double-layer PE film sliding layers, wherein the longitudinal and transverse lap joints of the adjacent double-layer PE film sliding layers are at least 80mm, and upturning is not needed;
step c, laying drainage plates, wherein the adjacent drainage plates do not need to be lapped;
d, spreading a broken stone mixture layer on the drainage plate;
step e, paving a road slab: when the unit road slab is laid, the elevation of two ends is controlled firstly, the wire is pulled through, and then the rubber is used for vertically striking the road slab to control the elevation.
The step e comprises the following steps:
step f, reserving a floor drain space at a preset floor drain area on the sidewalk area, and constructing a transition layer;
and g, all the waterproof heat-insulating layer, the protective isolation layer, the double-layer PE film sliding layer and the drainage plate in the sidewalk area extend into the floor drain space, a cover plate base is arranged on the upper side of the drainage plate, and a steel cover plate is arranged on the cover plate base to form a drainage well cover unit, so that the periphery of the drainage well cover unit is tightly propped against the broken stone mixture layer in the sidewalk area.
The method comprises the following steps after the step eight:
and h, paving a gravel belt between the soil separation baffle in the plant root system blocking area and the roof protruding structure and on the upper side of the filter fiber layer.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention relates to an energy-saving and environment-friendly system for preventing a room from overheating by utilizing solar energy blocked by plants planted on a roof plate of a greening roof structure. The principle is that a heat-insulating, anti-seepage, environment-friendly and energy-saving integrally-covered roof system is formed by laying construction of various layers such as a protective isolation layer, a water-dredging layer, a soil-isolation layer, a culture soil layer and a plant layer and a water supply, storage, dredging and drainage system. The invention is like a living 'plant blanket', and has the characteristics of high construction speed, low cost, light weight, little maintenance and low inspection frequency.
The method comprises the following specific steps:
firstly, the energy-saving and environment-friendly effects are obvious: the combination of plants planted on the roof and the heat-insulating material can effectively reduce the energy consumption of the building and improve the comfort level of the indoor space of the building.
Secondly, the application range is wide: the requirement on the roof is low, the building is less limited, and the load influence on the roof is small; the green plants have various varieties, are short and wind-resistant, do not need a large amount of water and fertilizer, are resistant to pollution and are easy to survive.
Thirdly, the process has strong operability, simple construction and simple operation.
Fourthly, the economic benefit is obvious: the period of a project is short, constructors are few, the life of vegetation is strong, maintenance is not needed in the later stage, once green planting engineering is completed, positive influence is generated on the environment, the environment aging resistance of materials is strong, the materials are not prone to degradation, the whole service life can reach 50 years, an irrigation system does not need to be arranged independently, and the problem of plant maintenance can be solved only by natural precipitation.
Fifthly, protecting a roof waterproof layer: the roof greening protects the roof waterproof layer from being damaged by negative factors such as extreme temperature difference, ultraviolet radiation, hail impact and the like, prolongs the service life of the roof and saves the cost.
Sixthly, rainwater recycling is realized: compared with the common green plant roof, the engineering greening can realize the recycling of 40-80% of annual precipitation.
Seventhly, the expenditure of rainwater discharge cost is reduced: more and more cities implement regulations for collecting rainwater drainage fees, according to the regulations, householders of ordinary roofs pay more rainwater drainage fees, and greening roofs pay less fees for recovering rainwater.
Eighthly, the maintenance cost and the water consumption cost are almost zero, the cost is 160 yuan per square meter for 120 plus materials, the cost of the domestic common green planting roof is 220 yuan per square meter for 180 plus materials, the water consumption cost is 10L per square meter, and the maintenance cost is 400 yuan per day for 200 plus materials. The invention can shorten the construction period of material transportation and skill operation, and has irreplaceable advantages in later maintenance and water saving.
Ninthly, reducing the peak value of the water discharge: in strong rainstorm weather, the greening engineering can play a role in buffering drainage, and the drainage pressure of the roof drainage pipeline is reduced.
Tenthly, improving the climate: the greening range and the nearby climate are improved through transpiration. The recovered rainwater is evaporated again, and the effect of reducing the environmental temperature is achieved.
Eleven, air purification: the soil and the green can adsorb the atmospheric floating dust and decompose harmful substances, thereby achieving the effect of purifying the air. The growth of the plants will also effectively reduce the carbon dioxide content of the air.
Twelfth, auxiliary heat insulation and cold resistance: the roof greening is equivalent to a second heat preservation measure, and helps achieve the effect of 'warm in winter and cool in summer' in a room.
Thirteen, improving the ecological environment: creating ecological environment, improving city environment appearance, raising the quality of city life and working environment and weakening city noise effectively.
The invention is suitable for the construction of green plant roofs, and has obvious effect especially for areas with clear four seasons.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a planting area according to an embodiment of the present invention.
Fig. 2 is an enlarged view of the structure of the soil-blocking baffle.
Fig. 3 is an enlarged view of the structure of the solid drainage aquifer.
Fig. 4 is a schematic structural diagram of a planting area and a sidewalk area according to a second embodiment of the invention.
FIG. 5 is a schematic structural diagram of a third floor drain region according to an embodiment of the present invention.
FIG. 6 is a schematic structural view of a four-plant root containment zone in accordance with an embodiment of the present invention.
Reference numerals: 1-a roof structure layer, 2-a waterproof insulating layer, 3-a protective isolation layer, 4-a solid water drainage and storage layer, 41-a water storage tank, 42-a ledge, 43-a drain hole, 44-a bump, 45-a drain tank, 5-a soil isolation layer, 6-a soil isolation baffle, 61-a loose drain hole, 7-a soil culture layer, 8-a plant layer, 9-a double-layer PE film sliding layer, 10-a drain plate, 11-a gravel mixture layer, 12-a pavement plate layer, 13-a floor drain space, 14-a transition layer, 15-a cover plate base, 16-a water seepage gap, 17-a steel cover plate, 18-a roof protrusion structure and 19-a gravel belt.
Detailed Description
Referring to fig. 1-3, a greening roof structure includes a roof structure layer 1, and further includes a waterproof heat-insulating layer 2, a protective isolation layer 3, a solid water drainage and storage layer 4, a soil isolation layer 5, a soil isolation baffle 6, a ridging layer 7 and a plant layer 8 which are sequentially compounded on the upper side surface of the roof structure layer 1 from bottom to top in a planting area of the roof structure layer 1.
The waterproof heat-insulating layer 2 is a root puncture-resistant acrylic acid recycled fiber waterproof heat-insulating layer.
The protective isolation layer 3 is laid on the upper side of the waterproof heat-insulating layer 2, the laying direction is the same as that of the waterproof heat-insulating layer 2, the joint part of the protective isolation layer and the vertical wall is upturned by 100mm, and the longitudinal and transverse lap joint width is 100 mm. The pipe well part of the pipeline and the pipe well part which are protruded out of the roof are turned upwards by 100 mm. The protective isolation layer 3 is an acrylic acid recycled fiber layer. Class 2 material, a material thickness of about 3mm, a weight per square meter of about 300g, resistance to mechanical stresses, separation of the different materials. The protective insulating layer RMS 300 mainly functions to protect the waterproof insulating layer against mechanical stress, and to insulate the upper and lower materials.
The solid water drainage and storage layer 4 is laid on the upper side of the protective isolation layer 3, the solid water drainage and storage layer 4 is made of high-density polyethylene regenerated materials, the thickness of the solid water drainage and storage layer is about 25mm, the weight of the solid water drainage and storage layer per square meter is 1.35 kilograms, the color of the solid water drainage and storage layer is black or gray, the maximum compression strength of the solid water drainage and storage layer is 161 kilonewtons per square meter, and the filling amount of the solid water drainage and storage.
Referring to fig. 3, the solid drainage and storage layer 4 includes a plate body, a storage tank 41 is formed on the upper side of the plate body and is recessed downward uniformly, a ledge 42 is formed around the storage tank 41 opposite to the storage tank, a drain hole 43 is formed on the ledge 42, a protrusion 44 is formed on the ledge at the four corners of the storage tank, and a drainage tank 45 is formed below the ledge 42.
The plate body is FKD 25, is paved on RMS 300 in a butt joint mode, is provided with a vent hole and a vent hole, and plays a role in water drainage and water storage. Having mainly played the role of rainwater collection and reducing rainfall peak outflow alleviating pipeline pressure, the FKD 25 water storage capacity thereof is about 15L/m-20L/m. For the green plants, rainwater permeates soil and enters the solid drainage and storage layer, the rainwater is collected in the water storage tank firstly, and flows into the drainage tank through the drainage hole after being saturated. Due to the concave-convex structure of the solid water drainage and storage layer, the flow path of rainwater in the drainage channel is greatly increased, and the pressure of a drainage system is relieved. According to the data FKD 25 increasing the rain flow path about 10 times, every two square meters of FKD 25 would increase the rain flow path to about 40 m.
The soil barrier layer 5 is a filter fiber layer, and the FIL105 is a 100% polypropylene layer for a base layer, has a thickness of about 1.1 mm, a weight of about 105 g/m, and a white color, and prevents fine particle contamination.
The mechanical filtration efficiency of the filtration fiber layer is 0.06 ≤ gew.o9 ≤ 0.2mm (EN ISO 12956), which means that the surface pore diameter of the filtration fiber layer FIL105 is 0.06mm to 0.2mm in diameter according to the European Union international standard EN ISO 12956. The CBR puncture resistance bearing capacity is at least 1.2 kN, the perpendicular water permeability is 130L/sm (EN ISO 11058), meaning the filter fiber layer FIL105 water permeability is 130 litres of water per second for 1 square meter FIL 105.
The lower side surface of the filtering fiber layer is fully adhered and bonded with the solid water drainage and storage layer 4 through spray glue spraying. The filtration fiber layer FIL105 has high water permeability, functions as a soil-isolation layer by preventing soil particles from penetrating, is puncture resistant, and serves as a separate drainage and matrix layer in a multi-layer structure.
The soil isolation baffle 6 is vertically arranged and surrounds the edge of the ridging layer 7 of the planting area, and the soil isolation baffle 6 is an aluminum plate and is light in weight of 1 kg-2 kg/lm. A group of loose drain holes 61 are formed in the soil separation baffle 6, the aperture of each loose drain hole is 5-8 mm, and the aperture distance is not larger than 10 mm. The horizontal lapping width of the adjacent soil separation baffle plates is not less than 50mm, and the effect of jointing the separated culture layer and different materials is achieved.
The culture soil layer 7 is sprayed on the upper side of the soil isolation layer 5, and the culture soil layer 7 is formed by mixing planting soil, vermiculite, pine needle soil and fertilizer in proportion. The thickness of the culture soil layer 7 is 80-100 mm, the pore volume percentage is more than 60 vol%, the water volume percentage is more than 35 vol%, the content of water-soluble salt is less than 3.5 kg/m, the content of organic substances is less than 65 kg/m, the pH value is 6.0-8.5, and the weight is 1140 kg/m to 1540 kg/m during thin film labor.
The plant layer 8 comprises herbaceous plant seeds and Crassulaceae plant seedlings, and the plant layer 8 is planted in the ridging layer 7. The herbaceous plant seeds at least comprise 30 plant seeds, and the Crassulaceae plant seedlings comprise at least 4-5 seeds.
Second embodiment referring to fig. 4, a greening roof structure, different from the first embodiment, further comprises a sidewalk area on the upper side of the roof structure layer 1 and between the soil-separating baffle plates 6 of the planting areas on two sides.
The sidewalk area comprises a waterproof heat-insulating layer 2, a protective isolation layer 3, a double-layer PE film sliding layer 9, a drainage plate 10, a gravel mixture layer 11 and a pavement board layer 12 which are sequentially compounded on the upper side surface of a roof structure layer 1 from bottom to top.
The double-layer PE film sliding layer 9 is laid on the upper side of the protective isolation layer 3, and two ends of the double-layer PE film sliding layer extend towards the planting area.
The drainage plate 10 is laid on the upper side of the double-layer PE film sliding layer 9, the drainage plate is FKD 10 and is made of a high-density polyethylene regenerated material, and the drainage plate is a polypropylene PP filtering layer which is about 10mm thick and 750 grams of square meter weight. Prevent the water retention of the roof, prevent the loose material on the upper part from sliding and resist frost cracking and freezing. Two adjacent drain bars are directly butted, and when the surface layer is a pavement brick, the surface layer is generally used for ensuring the bearing capacity of the pavement brick.
The gravel mixture layer 11 is paved on the upper side of the drainage plate 10, the thickness of the gravel mixture layer is 30mm-50mm, the gravel mixture comprises gravel with different grain diameters, and the grain diameter range of the gravel is 4mm-8 mm.
The pavement slab layer 12 is formed by paving unit pavement slabs on the gravel mixture layer 11, and the gap between every two adjacent slab unit pavement slabs is not more than 10 mm.
Third embodiment referring to fig. 5, a greening roof structure is different from the second embodiment in that a floor drain area is further arranged on the sidewalk area, a floor drain space 13 which is broken from small to large in a stepped manner is formed on the roof structure layer 1 of the floor drain area from bottom to top, transition layers 14 which are matched with and connected with the shape of the roof structure layer 1 are arranged on four sides of the floor drain space, and the middle of the floor drain space is communicated up and down.
The upside surface of the limit portion of transition layer 14 and the upside surface parallel and level of roofing structural layer 1, the upside surface of transition layer 14 slopes down gradually from limit portion to center, and the upside surface of transition layer 14 is connected with including extending to the ground drain region by the pavement district and by lower supreme compound waterproof insulation layer 2 in proper order, protection isolation layer 3, double-deck PE membrane sliding layer 9 and drain bar 10.
The drainage well cover unit is used for preventing sundries and base materials from entering the floor drain and has a walking function. The drainage well cover unit comprises a cover plate base and a steel cover plate. The extension end of the drainage plate 10 is shorter than the lower side structure, the cover plate base 15 is arranged on the upper side of the drainage plate 10 on two sides of the floor drain area in a falling mode, the cover plate base 15 is in lap joint with the drainage plates 10 on the periphery, and the lap joint width is not smaller than 50 mm. The side elevation of the cover plate base 15 is provided with water seepage gaps 16 for water to flow in conveniently. The outer side of the side vertical surface water seepage gap 16 is coated with a filter screen to prevent impurities from entering. The upper side of the cover plate base 15 is horizontally provided with a steel cover plate 17, four corners of the steel cover plate 17 are provided with nuts with adjustable height and flatness, and the peripheries of the cover plate base 15 and the steel cover plate 17 are tightly propped against the broken stone mixture layer 11 in the sidewalk area.
The height of well lid is 100mm, can superpose the setting. Length × width =370mm × 370 mm. Bottom length × width =470mm × 470mm, drain well diameter =300 mm. Drainage well cover weight =150 kg. The well lid can be opened, is equipped with 3mm wash port, and the well lid lateral wall has 3mm drainage seam, is equipped with 8 outlet in addition. The material is ABS recyclable material and is UV resistant.
Fourth embodiment referring to fig. 6, a greening roof structure, different from the first embodiment, further includes a roof protruding structure 18 located on the upper side of the roof structure layer 1, a plant root blocking area is arranged between the planting area and the roof protruding structure 18, and a soil-isolation baffle 6 is arranged between the planting area and the plant root blocking area. Under the condition that no plant root blocking measure exists, the roots of plants planted on the roof can prick into a protruding structure of the roof, such as a structural layer of an elevator shaft, a ventilation shaft, a smoke exhaust shaft and the like or a parapet wall, so that structural damage is caused.
The plant root system blocking area comprises a planting area extending a roof protruding structure 18, a waterproof heat-insulating layer 2, a protective isolation layer 3, a solid water drainage and storage layer 4 and a soil isolation layer 5 which are sequentially compounded from bottom to top, and further comprises a gravel belt 19 paved on the upper side of the soil isolation layer 5.
The gravel size of the gravel belt 19 is 16/22-16/32, the thickness is 5 cm, the width is 30-50 cm, the size is 16/32 mm, and the color is as follows: and (4) color.
The waterproof and heat-insulating layer 2 is paved from the planting area to the roof convex structure 18 until the roof convex structure 18 is fully paved and covers the top of the roof convex structure 18. The protective isolation layer 3 is turned upwards by at least 100mm from the planting area along the roof protruding structure 18. The filtering fiber layer is turned upwards by at least 100mm from the planting area along the roof protruding structure 18. The width of the gravel belt 19 is 400 mm-600 mm, and the thickness is 80 mm-100 mm.
Referring to fig. 1 to 3, the construction method of the greening roof structure according to the first embodiment includes the following steps:
step one, a roof structure layer 1 is constructed.
And step two, constructing a waterproof heat-insulating layer 2.
Step three, cleaning and acceptance inspection of the waterproof insulating layer 2:
a broom is adopted to clean dirt and dust on the waterproof heat-insulating layer 2, so that drying is guaranteed without impurities;
whether inspection waterproof insulation layer 2 satisfies planting roofing requirement, whether the bonding of inspection waterproof insulation layer 2 lap joint is firm, whether sealed tight, whether the coiled material direction of laying is correct, whether 18 position waterproof constructions of inspection flashing, movement joint and roofing bulge structure accord with design and standard requirement, do the experimental qualified back of retaining at last and can carry out subsequent handling.
And step four, releasing area control points of a planting area, a sidewalk area, a floor drain area and a plant root blocking area on the wall surface of the daughter according to the structure contour line and the roof layout drawing.
And fifthly, constructing and laying the protective isolation layers 3 in the same laying direction as the waterproof heat-insulating layer 2, wherein the longitudinal and transverse lap joint width between the adjacent protective isolation layers 3 is not less than 100mm, and the protective isolation layers are turned over by 100mm at least when meeting the roof protruding structure 18.
And step six, constructing the solid water drainage and storage layer 4, laying the solid water drainage and storage layer to a sidewalk area, cutting off the solid water drainage and storage layer, keeping the periphery of the solid water drainage and storage layer from turning upwards, adopting a butt joint mode in a lap joint mode, cutting and butting the solid water drainage and storage layer when encountering a convex structure 18 of a roof, and avoiding turning upwards.
And seventhly, constructing a soil isolation layer 5, firstly paving from one end of the periphery of the solid water drainage and storage layer 4, spraying the inner lower side surface with spray glue, then fully adhering and bonding the inner lower side surface with the solid water drainage and storage layer 4, wherein the lap joint width of adjacent filter fiber layers is not less than 100mm, and at least turning up 150mm when encountering the roof protruding structure 18.
And step eight, constructing the soil isolation baffles 6, enclosing the soil isolation baffles 6 around the planting area, wherein the horizontal lap joint width of the soil isolation baffles 6 is not less than 50mm, and the vertical lap joint width is not less than 100mm when meeting the yin-yang corner parts.
Step nine, spraying and hilling: after the preparation of the hilling material by a manufacturer is finished, the hilling material is put into a storage tank and directly transported to the site, then the hilling material is directly pumped to a roof greening area by a pump pipe to be sprayed,
the conveying principle of the hilling tank truck is mainly that the hilling material enters a pumping pipeline through a hopper and is conveyed to a designed position by compressing air inside the tank truck. The pot material for storing the hilling is mainly aluminum alloy composite material, and the wall thickness is usually 5 mm. The upper part of the tank truck is evenly provided with 3-4 charging openings, and the diameter of the charging openings is 450 mm. The tank is pressurized to a maximum of 2 pa under the action of a compressed air system. The discharge time of a 27 ton full tank truck is around 1 hour by pressure. For more convenient unloading, the end of the tank body is provided with a hydraulic jack, the tank body is lifted, the horizontal included angle is 45 degrees, so that materials can freely fall into a hopper below to enter a pipeline, and the diameter of the conveying pipeline is generally selected from four models, namely DN80, DN100, DN150 and DN 200. The pumping height can reach about 100m,
the spraying head part is provided with a manual control cover plate for preventing the hilling from being freely sprayed, an operator wears a safety tool, the manual control cover plate supports the pipe head with one hand, the pipe head is bent downwards, the hilling material is sprayed out at an angle of 45 degrees to the horizontal plane, and the spraying radius is controlled within a range of 1.5 m;
spray from inside to outside, evenly spray to all around by well, it sprays thickness and uses the baffle 6 height that separates soil as the control point, is less than the baffle 6 high 3mm-5mm scope that separates soil, spreads gently with the rake to the position of spraying the inhomogeneous thickness and pushes away hilling, reaches thickness evenly.
Step ten, planting grass seeds:
herbaceous plant seed: the seed sowing time is 4-6 months, the seed sowing adopts manual sowing, and the sowing density is 1200 grains/square meter;
crassulaceae plant seedling: paying off according to the plant seedling distribution area to determine the position, digging a circular groove with the diameter of 100mm and the depth of 50-70 mm by using a small shovel, planting the culture soil for culturing the plant seedling and the plant seedling together, and compacting peripheral soil in the peripheral gap.
The grass seeds are selected from plants belonging to Crassulaceae and having drought resistance and low maintenance, and the sowing time is 4-6 months, so that the best vegetation coverage rate can be obtained in 9-10 months. A coverage of about 60-80% after one year. Because the drought-resistant and low-maintenance plants are selected, irrigation is not needed after hand spreading is finished, and the problem of plant maintenance can be solved only by natural precipitation.
Referring to fig. 4, the construction method of the green roof structure according to the second embodiment further includes the following steps after the fifth step of the construction method according to the first embodiment:
step a, according to the soil separation baffles 6 on two sides of the control line construction pedestrian road area, the soil separation baffles 6 are directly placed on the protective isolation layer 3.
And b, paving the double-layer PE film sliding layers 9, wherein the longitudinal and transverse lap joints of the adjacent double-layer PE film sliding layers 9 are all at least 80mm, and upturning is not needed.
And c, paving the drainage plates 10, wherein the adjacent drainage plates 10 do not need to be lapped.
And d, spreading a crushed stone mixture layer 11 on the drainage plate 10.
Step e, paving a road slab: when the unit road slab is laid, the elevation of two ends is controlled firstly, the wire is pulled through, and then the rubber is used for vertically striking the road slab to control the elevation.
Referring to fig. 5, the construction method of the greening roof structure according to the third embodiment includes the following steps after step e of the second embodiment:
and f, reserving a floor drain space at a preset floor drain area on the sidewalk area, and constructing a transition layer 14.
And g, the waterproof heat-insulating layer 2, the protective isolation layer 3, the double-layer PE film sliding layer 9 and the drainage plate 10 in the sidewalk area all extend into the floor drain space, a cover plate base 15 is arranged on the upper side of the drainage plate 10, and a steel cover plate 17 is arranged on the cover plate base 15 to form a drainage well cover unit, so that the periphery of the drainage well cover unit is tightly propped against the broken stone mixture layer 11 in the sidewalk area.
Referring to fig. 6, the construction method of the green roof structure according to the fourth embodiment includes the following steps after the eighth step of the first embodiment:
and h, paving a gravel belt 19 between the soil separation baffle 6 in the plant root system blocking area and the roof protruding structure 18 and on the upper side of the filter fiber layer.
Claims (10)
1. A greening roof structure is characterized in that: comprises a roof structure layer (1), a waterproof heat-insulating layer (2), a protective isolation layer (3), a solid water drainage and storage layer (4), a soil isolation layer (5), a soil isolation baffle plate (6), a soil culture layer (7) and a plant layer (8) which are sequentially compounded on the upper side surface of the roof structure layer (1) from bottom to top in a planting area of the roof structure layer (1),
the waterproof heat-insulating layer (2) is a root puncture resistant waterproof heat-insulating layer,
the protective isolation layer (3) is laid on the upper side of the waterproof heat-insulating layer (2) in the same direction as the waterproof heat-insulating layer (2),
the solid drainage and storage layer (4) is laid on the upper side of the protective isolation layer (3), the solid drainage and storage layer (4) comprises a plate body, a water storage tank (41) is uniformly and inwards formed on the upper side of the plate body downwards, a ledge (42) is formed on the periphery of the water storage tank (41) relative to the water storage tank, a drain hole (43) is formed in the ledge (42), protrusions (44) are formed upwards at the positions of four corners of the water storage tank, a drainage groove (45) is formed below the ledge (42),
the soil isolation layer (5) is a filtering fiber layer, the lower side surface of the filtering fiber layer is fully adhered and bonded with the solid water drainage and storage layer (4) through spraying glue,
the soil-isolating baffle plate (6) is vertically arranged and enclosed at the edge of a culture soil layer (7) of the planting area, a group of loose drain holes (61) are arranged on the soil-isolating baffle plate (6),
the culture soil layer (7) is sprayed on the upper side of the soil isolation layer (5), the culture soil layer (7) is formed by mixing planting soil, vermiculite, pine needle soil and fertilizer,
the plant layer (8) comprises herbaceous plant seeds and Crassulaceae plant seedlings, and the plant layer (8) is planted in the culture soil layer (7).
2. A green roofing construction as defined in claim 1 wherein:
the solid water drainage and accumulation layer (4) is made of polyethylene regenerated material,
the protective isolation layer (3) is an acrylic acid recycling fiber layer, the filtering fiber layer is a polypropylene layer, the surface pore diameter of the polypropylene layer is between 0.06mm and 0.2mm, the puncture resistance bearing capacity is at least 1.2 kN, and the vertical water permeability is at least 130L/sm;
the soil isolation baffle (6) is an aluminum plate, the aperture of the loose drain hole is 5-8 mm, and the aperture distance is not more than 10 mm.
3. A green roofing construction as defined in claim 1 wherein: the thickness of the culture soil layer (7) is 80-100 mm, the pH value is 6.0-8.5, and the weight is 1140 kg/m for carrying out double-row high-speed cultivation and 1540 kg/m for carrying out double-row high-speed cultivation.
4. A green roofing construction according to any one of claims 1 to 3, wherein: also comprises a sidewalk area which is arranged on the upper side of the roof structure layer (1) and between the soil separating baffles (6) of the planting areas on the two sides,
the sidewalk area comprises a waterproof heat-insulating layer (2), a protective isolation layer (3), a double-layer PE film sliding layer (9), a drainage plate (10), a broken stone mixture layer (11) and a pavement slab layer (12) which are sequentially compounded on the upper side surface of a roof structure layer (1) from bottom to top,
the double-layer PE film sliding layer (9) is laid on the upper side of the protective isolation layer (3), two ends of the double-layer PE film sliding layer extend towards the planting area,
the drainage plate (10) is laid on the upper side of the double-layer PE film sliding layer (9) and made of polyethylene regenerated material,
the gravel mixture layer (11) is paved on the upper side of the drainage plate (10) and has the thickness of 30mm-50mm, the gravel mixture comprises gravels with different grain diameters, the grain diameter range of the gravels is 4mm-8mm,
the pavement slab layer (12) is formed by paving unit pavement slabs on the gravel mixture layer (11), and the gap between every two adjacent slab unit pavement slabs is not more than 10 mm.
5. A green roofing construction according to claim 4, wherein: the sidewalk area is provided with a floor drain area, a floor drain space (13) which is broken from small to large in a ladder way is formed on the roof structure layer (1) of the floor drain area from bottom to top, transition layers (14) which are matched with the shape of the roof structure layer (1) and connected with the roof structure layer are arranged on four sides of the floor drain space, the middle part of the floor drain space is communicated up and down,
the upper side surface of the edge part of the transition layer (14) is flush with the upper side surface of the roof structure layer (1), the upper side surface of the transition layer (14) is gradually inclined downwards from the edge part to the center, the upper side surface of the transition layer (14) is connected with a waterproof heat-insulating layer (2), a protective isolation layer (3), a double-layer PE film sliding layer (9) and a drainage plate (10) which extend from a sidewalk area to a floor drain area and are sequentially compounded from bottom to top,
the extension end of drain bar (10) is in downside structure, and drain bar (10) upside of floor drain district both sides has fallen and has been put apron base (15), apron base (15) and drain bar (10) overlap joint all around, and the side facade of apron base (15) is equipped with infiltration space (16), and the outside cladding that the side facade infiltrated space (16) has the filter screen, but apron base (15) upside tie has steel apron (17), and the four corners of steel apron (17) have the nut of height-adjusting and roughness, all around apron base (15) and steel apron (17) unit all with pavement district's rubble mixture layer (11) top tightly.
6. A green roofing construction according to claim 4, wherein: also comprises a roof convex structure (18) positioned on the upper side of the roof structure layer (1), a plant root system blocking area is arranged between the planting area and the roof convex structure (18), a soil isolation baffle plate (6) is arranged between the planting area and the plant root system blocking area,
the plant root system blocking area comprises a water-proof heat-insulating layer (2), a protective isolation layer (3), a solid water drainage and storage layer (4) and a soil isolation layer (5) which are sequentially compounded from the planting area to the roof convex structure (18) and from bottom to top, and also comprises a gravel belt (19) laid on the upper side of the soil isolation layer (5),
the waterproof heat-insulating layer (2) is paved from the planting area to the roof convex structure (18) until the waterproof heat-insulating layer is fully paved and covers the top of the roof convex structure (18),
the protective isolation layer (3) is turned upwards by at least 100mm from the planting area along the roof protruding structure (18),
the filtering fiber layer is turned upwards by at least 100mm from the planting area along the roof protruding structure (18),
the width of the gravel belt (19) is 400-600 mm, and the thickness is 80-100 mm.
7. A method of constructing a green roof construction according to any one of claims 1 to 3, characterised in that the construction steps are as follows:
firstly, constructing a roof structure layer (1);
secondly, constructing a waterproof heat-insulating layer (2);
step three, cleaning and acceptance inspection of the waterproof heat-insulating layer (2):
a broom is adopted to clean dirt and dust on the waterproof heat-insulating layer (2) so as to ensure drying and no sundries;
checking whether the waterproof heat-insulating layer (2) meets the requirements of a planted roof, whether the lap joint of the waterproof heat-insulating layer (2) is firmly bonded, whether the sealing is tight, whether the laying direction of the coiled material is correct, whether the flashing, the deformation joint and the waterproof structure at the position of the roof protruding structure (18) meet the design and specification requirements, and finally performing subsequent processes after the water storage test is qualified;
fourthly, according to the structural contour line and the roof layout drawing, releasing area control points of a planting area, a sidewalk area, a floor drain area and a plant root blocking area on the wall surface of the daughter;
fifthly, constructing and laying the protective isolation layers (3), wherein the laying direction is the same as that of the waterproof heat-insulating layer (2), the longitudinal and transverse lap joint width between adjacent protective isolation layers (3) is not less than 100mm, and the protective isolation layers are turned over at least 100mm when encountering a roof protruding structure (18);
constructing a solid water drainage and storage layer (4), laying the solid water drainage and storage layer to a sidewalk area, cutting off the solid water drainage and storage layer without turning up the periphery, adopting butt joint in a lap joint mode, cutting and butting when encountering a roof convex structure (18), and avoiding turning up;
constructing a soil isolation layer (5), firstly paving from one end of the periphery of the solid water drainage and storage layer (4), spraying spray glue on the inner lower side surface, then fully adhering and bonding with the solid water drainage and storage layer (4), wherein the overlapping width of adjacent filter fiber layers is not less than 100mm, and the adjacent filter fiber layers are at least turned over by 150mm when encountering a roof protruding structure (18);
constructing a soil isolation baffle plate (6), enclosing the soil isolation baffle plate (6) around the planting area, wherein the horizontal lap joint width of the soil isolation baffle plate (6) is not less than 50mm, and the vertical lap joint width is not less than 100mm when meeting the yin-yang angle part;
step nine, spraying and hilling: after the preparation of the hilling materials by a manufacturer is finished, the hilling materials are put into a storage tank and directly transported to the site, then the hilling materials are directly pumped to a roof greening area by a pump pipe for spraying, a manual control cover plate for preventing hilling from being freely sprayed is arranged at the head of the hilling head, an operator wears a safety tool, the manual control cover plate holds a pipe head with one hand, the pipe head is bent downwards, the hilling materials are sprayed out at an angle of 45 degrees to the horizontal plane, and the spraying radius is controlled within the range of 1.5 m;
the spraying is evenly sprayed from inside to outside from the middle to the periphery, the spraying thickness takes the height of the soil separation baffle plate (6) as a control point, the spraying thickness is 3mm-5mm lower than the height of the soil separation baffle plate (6), and the positions with uneven spraying thickness are lightly paved and pushed by rake to achieve even thickness;
step ten, planting grass seeds:
herbaceous plant seed: the seed sowing time is 4-6 months, the seed sowing adopts manual sowing, and the sowing density is 1200 grains/square meter;
crassulaceae plant seedling: paying off according to the plant seedling distribution area to determine the position, digging a circular groove with the diameter of 100mm and the depth of 50-70 mm by using a small shovel, planting the culture soil for culturing the plant seedling and the plant seedling together, and compacting peripheral soil in the peripheral gap.
8. A method of constructing a green roofing construction as claimed in claim 7, further comprising the steps of, after step five:
step a, directly placing soil-isolation baffles (6) on a protective isolation layer (3) according to the soil-isolation baffles (6) on two sides of a control line construction pedestrian road area;
b, paving double-layer PE film sliding layers (9), wherein the longitudinal and transverse lap joints of the adjacent double-layer PE film sliding layers (9) are all at least 80mm, and upturning is not needed;
step c, laying the drainage plates (10), wherein the adjacent drainage plates (10) do not need to be lapped;
d, spreading a crushed stone mixture layer (11) on the drainage plate (10);
step e, paving a road slab: when the unit road slab is laid, the elevation of two ends is controlled firstly, the wire is pulled through, and then the rubber is used for vertically striking the road slab to control the elevation.
9. A method of constructing a green roofing construction as claimed in claim 8, including the following steps after step e:
step f, reserving a floor drain space at a preset floor drain area on the sidewalk area, and constructing a transition layer (14);
step g, the waterproof heat-insulating layer (2), the protective isolation layer (3), the double-layer PE film sliding layer (9) and the drainage plate (10) in the sidewalk area all stretch into the floor drain space, a cover plate base (15) is arranged on the upper side of the drainage plate (10), and a steel cover plate (17) is arranged on the cover plate base (15) to form a drainage well cover unit, so that the periphery of the drainage well cover unit is tightly propped against the broken stone mixture layer (11) in the sidewalk area.
10. A method of constructing a green roof construction as claimed in any one of claims 7 to 9, wherein after step eight the method includes the steps of:
and h, paving a gravel belt (19) between the soil separation baffle (6) of the plant root system blocking area and the roof protruding structure (18) and on the upper side of the filtering fiber layer.
Priority Applications (1)
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